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vendor/picotls/lib/picotls.c  view on Meta::CPAN

/*
 * Copyright (c) 2016 DeNA Co., Ltd., Kazuho Oku
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
#ifdef _WINDOWS
#include "wincompat.h"
#endif
#include <assert.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifndef _WINDOWS
#include <errno.h>
#include <pthread.h>
#include <unistd.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/time.h>
#include <sys/types.h>
#endif
#ifdef __linux__
#include <sys/syscall.h>
#endif
#ifdef __APPLE__
#include <AvailabilityMacros.h>
#endif
#include "picotls.h"
#if PICOTLS_USE_DTRACE
#include "picotls-probes.h"
#endif

#define PTLS_MAX_PLAINTEXT_RECORD_SIZE 16384
#define PTLS_MAX_ENCRYPTED_RECORD_SIZE (16384 + 256)

#define PTLS_RECORD_VERSION_MAJOR 3
#define PTLS_RECORD_VERSION_MINOR 3

#define PTLS_CONTENT_TYPE_CHANGE_CIPHER_SPEC 20
#define PTLS_CONTENT_TYPE_ALERT 21
#define PTLS_CONTENT_TYPE_HANDSHAKE 22
#define PTLS_CONTENT_TYPE_APPDATA 23

#define PTLS_PSK_KE_MODE_PSK 0
#define PTLS_PSK_KE_MODE_PSK_DHE 1

#define PTLS_HANDSHAKE_HEADER_SIZE 4

#define PTLS_EXTENSION_TYPE_SERVER_NAME 0
#define PTLS_EXTENSION_TYPE_STATUS_REQUEST 5
#define PTLS_EXTENSION_TYPE_SUPPORTED_GROUPS 10
#define PTLS_EXTENSION_TYPE_SIGNATURE_ALGORITHMS 13
#define PTLS_EXTENSION_TYPE_ALPN 16
#define PTLS_EXTENSION_TYPE_SERVER_CERTIFICATE_TYPE 20
#define PTLS_EXTENSION_TYPE_COMPRESS_CERTIFICATE 27
#define PTLS_EXTENSION_TYPE_PRE_SHARED_KEY 41
#define PTLS_EXTENSION_TYPE_EARLY_DATA 42
#define PTLS_EXTENSION_TYPE_SUPPORTED_VERSIONS 43
#define PTLS_EXTENSION_TYPE_COOKIE 44
#define PTLS_EXTENSION_TYPE_PSK_KEY_EXCHANGE_MODES 45
#define PTLS_EXTENSION_TYPE_CERTIFICATE_AUTHORITIES 47
#define PTLS_EXTENSION_TYPE_KEY_SHARE 51
#define PTLS_EXTENSION_TYPE_TICKET_REQUEST 58
#define PTLS_EXTENSION_TYPE_ECH_OUTER_EXTENSIONS 0xfd00
#define PTLS_EXTENSION_TYPE_ENCRYPTED_CLIENT_HELLO 0xfe0d

#define PTLS_SERVER_NAME_TYPE_HOSTNAME 0

#define PTLS_ECH_CONFIG_VERSION 0xfe0d
#define PTLS_ECH_CLIENT_HELLO_TYPE_OUTER 0
#define PTLS_ECH_CLIENT_HELLO_TYPE_INNER 1

#define PTLS_ECH_CONFIRM_LENGTH 8

static const char ech_info_prefix[8] = "tls ech";

#define PTLS_SERVER_CERTIFICATE_VERIFY_CONTEXT_STRING "TLS 1.3, server CertificateVerify"
#define PTLS_CLIENT_CERTIFICATE_VERIFY_CONTEXT_STRING "TLS 1.3, client CertificateVerify"
#define PTLS_MAX_CERTIFICATE_VERIFY_SIGNDATA_SIZE                                                                                  \
    (64 + sizeof(PTLS_SERVER_CERTIFICATE_VERIFY_CONTEXT_STRING) + PTLS_MAX_DIGEST_SIZE * 2)

#define PTLS_EARLY_DATA_MAX_DELAY 10000 /* max. RTT (in msec) to permit early data */

#ifndef PTLS_MAX_EARLY_DATA_SKIP_SIZE
#define PTLS_MAX_EARLY_DATA_SKIP_SIZE 65536
#endif